Zs. P. Komáromy szerk.: Studia Botanica Hungarica 15. 1981 (Budapest, 1981)

Dobolyi, Konstantin, Szabó, László , Szerdahelyi, Tibor; Szujkó-Lacza, Júlia: Data to the Genisto pilosae-Quercetum and the flora of the Bükk Mountains

STUDIA XV. BOTANICA HUNGARICA (Antea: Fragmenta Botanica) 1981 p. 77-90 Data to the Genisto pilosae-Quercetum and the flora of the Bükk Mountains By K. DOBOLYI, L. SZABÓ, T. SZERDAHELYI and J. SZUJKÓ-LACZA (Received November 30, 1980) Abstract: In the Bükk National Park a locality of Genisto-Quercetum was compared with other localities of a similar community on acidic soil. The H' and J values of the coverage of individual species and of all of the species per quadrate, the distribution area and life-form were analysed. We have found three new localities of Telekia speciosa in the Hór valley and one locality of Vaccinium myrtillus In Odorhegy (Genisto-Quercetum)

. 406 vascular plants have been listed: 5 are floristically new. Introduction We organized a botanical collecting tour to the Hór valley in the Southern-Biikk in June, 1980. We used the time to study the surroundings, and to collect florlstical data about Hór valley. This valley and its surroundings is a strictly protected area of the Bükk National Park. The East of the valley is mostly limestone, in the west mainly clay slate constitutes the Southern-Bükk. It is characteristic for the long valleys in Bükk that narrow ravines engraved on limestone alternate with plain, loose hollows, deepened in clay slate. The valleys in the Southern-Bükk are separated from each other by non-karstic hills with gentle slopes and mountains reminding of uplifted blocks (e.g. Odorvár). Mainly the slopes of cliffs with rock vegetation (e.g. Odorvár, Hosszúgalya, above Subalyuk cave) and the cleared woodlands of uplifted blocks are covered with karrenfelds. Quartz and flint interbeddings can be seen in the limestone on the slope of Hór valley (PINCZÉS 1955). The hard, hardly flaking quartz pieces stick out of the round edged fissures like a sharp face. There are several dolinas, sink holes here (e.g. Subalyuk cave, Hajnóczy cave near Odorvár). The wide, plain sandhills of the southern parts of Bükkalja, somewhere covered with loess, originate from the alluvial cones of brocks of Bükk. The valleys of brooks with widening flood basin and shelf are deepened in these sandhills. This is really a transitional zone towards the Great Hungarian Plain, as the large mountains suddenly disappear about 300 m of Subalyuk and the Bükkalja is continued in the form of gentle slopes. The water output of Hór valley is fluctuating, but it is relatively abounding in water. In rainless weather it could be observed that the brook disappeared here and there like an underground stream and it flowed away in an under level, then appeared again. Clay lessivated brown forest soil could be found in most parts of Bükkalja (in Hór valley, too) and types of meadow soil (STEFANOVITS 1963) in the brook valleys. During the collecting trip the following localities were visited: Perpác, Subalyuk, Kis-Piliske, Odorhegy, Odorvár, Mákszem, Oszla, Füzérkó', Felsó'-Csákány, Tebe-puszta, Hosszúgalya, Gyertyán völgy. The first species list of Genisto pilosae-Quercetum was published by MAGYAR (1933) from Répáshuta und Ohuta in the Bükk Mts. as Quercus sessilis-Genista pilosa community (it is Indicated with No. 4 in Table 1). It was classified and terminated coenosystematically by ZÓLYOMI & JAKUCS (1957). They gave the name of the community as Genisto pilosae -